Hydranautics ESPA Series Membranes

Hydranautics ESPA (Energy-Saving Polyamide) RO membranes continue to meet the ever-increasing demands of the water treatment industry. Industrial users worldwide have made ESPA their choice for high productivity and salt rejection. There's an ESPA solution to satisfy even the most challenging water treatment needs with exceptional performance, productivity and savings.

ESPA2 Series Hydranautics RO Membrane Elements

ESPA2 product family offers new technology for higher productivity and rejection; minimizes bio-fouling & colloidal fouling and features and enhanced cleanability. The ESPA2 MAX features increased surface area for higher permeate production.

Model No.

Size (Dia.”× Length”)

Flow Rate

Test Pressure (psi)

Nominal Salt Rejection (%)

Minimum Salt Rejection (%)

gpd

m³/d

ESPA2-4040

4” × 40”

1,900

7.2

150

99.6

99.4

ESPA2-LD-4040

4” × 40”

2,000

7.6

150

99.6

99.4

ESPA2

8” × 40”

9,000

34.1

150

99.6

99.5

ESPA2-LD

8” × 40”

10,000

37.9

150

99.6

99.5

ESPA2MAX

8” × 40”

12,000

45.4

150

99.6

99.5

ESPA3 Series Hydranautics RO Membrane Elements

ESPA3 Series membrane elements offer the highest product water flow rates of the Hydranautics ESPA family of membrane elements.

Model No.

Size (Dia.”× Length”)

Flow Rate

Test Pressure (psi)

Nominal Salt Rejection (%)

Minimum Salt Rejection (%)

gpd

m³/d

ESPA3-4040

4” × 40”

3,000

11.4

150

98.5

98.0

ESPA3

8” × 40”

14,000

53.0

150

98.5

98.0

ESPA4 Series Hydranautics RO Membrane Elements

ESPA 4 Series membrane elements feature a lower operating pressure, resulting in lower operating costs, while maintaining high productivity and a minimum salt rejection of 99%.

Model No.

Size (Dia.”× Length”)

Flow Rate

Test Pressure (psi)

Nominal Salt Rejection (%)

Minimum Salt Rejection (%)

gpd

m³/d

ESPA4-4040

4” × 40”

2,500

9.5

100

99.2

99.0

ESPA4

8” × 40”

12,000

45.4

100

99.2

99.0

ESPA4-LD

8” × 40”

12,000

45.4

100

99.2

99.0

ESPA4MAX

8” × 40”

13,200

50.0

100

99.2

99.0

ESPAB Series Boron Removal Hydranautics RO Membrane Elements

ESPA B boron removing elements provide a new option for communities where boron levels are naturally high or for manufacturers challenged by boron contamination issues.

Model No.

Size (Dia.”× Length”)

Flow Rate

Test Pressure (psi)

Salt Rejection (%)

Ave. Boron Rej. (%@10psi)

gpd

m³/d

Nominal

Minimum

ESPABMAX

8” × 40”

9,000

34.1

150

99.3

99

99.6

Please see product specification sheets for the test conditions under which the stated performance are based, and exact membrane element dimensions.

Features

Enhanced Membrane Chemistry for Increased Chemical Resistance

Innovative Spacer Design to Minimize Trapping of Small Colloidal Particles